OPENQASM 2.0;
include "qelib1.inc";
qreg q[4];
h q[0];
h q[1];
h q[2];
h q[3];
cz q[0],q[1];
cz q[1],q[2];
cz q[2],q[3];
rx(0.5) q[0];
rx(0.5) q[1];
rx(0.5) q[2];
rx(0.5) q[3];